v0.6.4

0.6.4 — 2026-07-25

• New: scripts/coverage.py — per person, how well is she actually covered and what
  is missing? Reports photo count, diversity (mean pairwise similarity), viewing angles
  estimated from the landmarks (frontal / half / profile), day vs night/IR shots, and a
  leave-one-out self test — then names the concrete gap ("no frontal shot", "no night
  shot", "too few photos").
• New: scripts/measure-recognition.py — did enrolling actually help? Compares the
  current gallery against an older one (an unpacked backup) via leave-one-out, plus a
  practical probe against recent Frigate events.
• The self test is deliberately harsh and pessimistic on small galleries — with five
  varied photos, each has to hold up against four entirely different situations. It is
  only reported as a defect from eight photos up, and a low value means "these photos
  reinforce each other weakly", not "this person is not recognised in practice".